Mechanistic Modeling of Carbon Steel Corrosion in a Methyldiethanolamine (MDEA)-Based Carbon Dioxide Capture Process

CORROSION ◽  
10.5006/0695 ◽  
2013 ◽  
Vol 69 (6) ◽  
pp. 551-559 ◽  
Author(s):  
Yoon-Seok Choi ◽  
Deli Duan ◽  
Shengli Jiang ◽  
Srdjan Nešić
Keyword(s):  
Carbon Dioxide ◽  
Carbon Steel ◽  
Model Development ◽  
Electrochemical Corrosion ◽  
Steel Corrosion ◽  
Mechanistic Modeling ◽  
Uniform Corrosion ◽  
Capture Process ◽  
Corrosion Model ◽  
Carbon Dioxide Co2

A predictive model was developed for corrosion of carbon steel in carbon dioxide (CO2)-loaded aqueous methyldiethanolamine (MDEA) systems, based on modeling of thermodynamic equilibria and electrochemical reactions. The concentrations of aqueous carbonic and amine species (CO2, bicarbonate [HCO3−], carbonate [CO32−], MDEA, and protonated MDEA [MDEAH+]) as well as pH values in the MDEA solution were calculated. The water chemistry model showed a good agreement with experimental data for pH and CO2 loading, with an improved correlation upon use of activity coefficients. The electrochemical corrosion model was developed by modeling polarization curves based on the given species's concentrations. The required electrochemical parameters (e.g., exchange current densities, Tafel slopes, and reaction orders) for different reactions were determined from experiments conducted in glass cells. Iron oxidative dissolution, HCO3− reduction, and MDEAH+ reduction reactions were implemented to build a comprehensive model for corrosion of carbon steel in an MDEA-CO2-water (H2O) environment. The model is applicable to uniform corrosion when no protective films are present. A solid foundation is provided for corrosion model development for other amine-based CO2 capture processes.

scholarly journals The Roles of H2S Gas in Behavior of Carbon Steel Corrosion in Oil and Gas Environment: A Review

2018 ◽  
Vol 7 (1) ◽  
pp. 37 ◽  
Author(s):  
Yuli Panca Asmara
Keyword(s):  
Carbon Steel ◽  
Oil And Gas ◽  
Chemical Properties ◽  
Steel Corrosion ◽  
Carbon Steels ◽  
Corrosion Mechanism ◽  
Gas Reservoir ◽  
H2s Corrosion ◽  
Carbon Dioxide Co2 ◽  
Oil And Gas Reservoir

Hydrogen sulfide (H2S) is the most dangerous element which exists in oil and gas reservoir. H2S acidifies water which causes pitting corrosion to carbon steel pipelines. Corrosion reaction will increase fast when it combines with oxygen and carbon dioxide (CO2). Thus, they can significantly reduce service life of transportation pipelines and processing facilities in oil and gas industries. Understanding corrosion mechanism of H2S is crucial to study since many severe deterioration of carbon steels pipelines found in oil and gas industries facilities. To investigate H2S corrosion accurately, it requires studying physical, electrical and chemical properties of the environment. This paper concentrates, especially, on carbon steel corrosion caused by H2S gas. How this gas reacts with carbon steel in oil and gas reservoir is also discussed. This paper also reviews the developments of corrosion prediction software of H2S corrosion. The corrosion mechanism of H2S combined with CO2 gas is also in focused. 

Effect of lower carboxylic acids on carbon steel corrosion in model stratum water in presence of carbon dioxide and inhibitor

2020 ◽  
Vol 0 (7) ◽  
pp. 41-47
Author(s):  
Vladimir Vigdorovich ◽  
◽  
Liudmila Tsygankova ◽  
Marina Uryadnikova ◽  
Natalia Shel ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Steel ◽  
Carboxylic Acids ◽  
Steel Corrosion

New metal complexes with inhibiting and biocide properties

2020 ◽  
pp. 46-52
Author(s):  
F.F. Veliyev ◽  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Steel ◽  
Hydrogen Sulphide ◽  
Copper Complex ◽  
Produced Water ◽  
Methanol Solutions ◽  
Production Wells ◽  
Carbon Dioxide Co2 ◽  
Water Saturated ◽  
Reducing Bacteria

Methanol solutions of various concentrations have been developed based on synthesized N, Nʹ- (pirazin-2-il) pyridine - 2,6-diamine ligand (N5-2pz), its linear pentanuclear of nickel string (II) [Ni5(μ5-dpzpda)4Cl2] (Ni5-N5-2pz) and tetracyclic copper complex (II) [Cu4(Hdpzpda)2(CH3COO)6] (Cu4-N5-2pz). Anticorrosion impact of these solutions on carbon steel Сt20 was studied on the model of produced water saturated with carbon dioxide (CO2) in the medium of hydrogen sulphide with different concentrations (H2S). Biocide properties of developed solutions against corrosion bacteria (sulphate-reducing bacteria, Tionand hydrocarbon oxidizing bacteria) have been studied on the samples of produced water taken from flooded production wells of “Bibiheybat” OGPD as well and good results obtained.

scholarly journals HIC and SSC of Carbon Steel in High Partial Pressure CO2 Environments with Elevated H2S

2021 ◽  
Vol 287 ◽  
pp. 02001
Author(s):  
Ahmad Zaki Abas ◽  
Azmi Mohammed Nor ◽  
Muhammad Firdaus Suhor ◽  
Ahmad Mustaza Ahmad Rusli ◽  
Mokhtar Che Ismail
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Carbon Steel ◽  
Field Condition ◽  
Standard Test ◽  
Sulfide Concentration ◽  
Surface Cracking ◽  
Sulfide Stress ◽  
Carbon Dioxide Co2 ◽  
Sour Service

The Hydrogen Induced Cracking (HIC) and Sulfide Stress Cracking (SSC) behaviours of sour service and non-sour service carbon steel API 5L X65 were investigated under high pressure carbon dioxide environments, containing elevated amount of hydrogen sulphide (H2S); the test environments simulated offshore pipelines transporting full-well streams in high carbon dioxide (CO2) environments with elevated H2S concentrations. It was systematically studied under standard NACE condition and high pressure carbon dioxide field condition with variation in other key parameters (temperature, pressure and hydrogen sulfide concentration). The HIC and SSC were tested using a High Pressure and High Temperature (HPHT) Autoclave. The surface cracking morphology was analysed using Scanning Electron Microscopy (SEM), Ultrasonic Technique (UT) and Magnetic Particle (MP). The results showed that no cracks were detected in NACE standard and field-condition SSC tests for both sour service and non-sour services carbon steel. In HIC test, crack was detected on non-sour service carbon steel in NACE standard test while no crack was detected on field condition-based tests for both types of carbon steel.

scholarly journals Biofilm Formation Plays a Crucial Rule in the Initial Step of Carbon Steel Corrosion in Air and Water Environments

Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 923 ◽  
Author(s):  
Akiko Ogawa ◽  
Keito Takakura ◽  
Nobumitsu Hirai ◽  
Hideyuki Kanematsu ◽  
Daisuke Kuroda ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Thermal Spray ◽  
Biofilm Formation ◽  
Zinc Coating ◽  
Electrochemical Corrosion ◽  
Spray Coating ◽  
Steel Corrosion ◽  
Thermal Spray Coating ◽  
Iron Corrosion ◽  
Microbially Influenced Corrosion

In this study, we examined the relationship between the effect of a zinc coating on protecting carbon steel against biofilm formation in both air and water environments. SS400 carbon steel coupons were covered with a zinc thermal spray coating or copper thermal spray coating. Coated coupons were exposed to either air or water conditions. Following exposure, the surface conditions of each coupon were observed using optical microscopy, and quantitatively analyzed using an x-ray fluorescence analyzer. Debris on the surface of the coupons was used for biofilm analysis including crystal violet staining for quantification, Raman spectroscopic analysis for qualification, and microbiome analysis. The results showed that the zinc thermal spray coating significantly inhibited iron corrosion as well as biofilm formation in both air and water environments. The copper thermal spray coating, however, accelerated iron corrosion in both air and water environments, but accelerated biofilm formation only in a water environment. microbially-influenced-corrosion-related bacteria were barely detected on any coupons, whereas biofilms were detected on all coupons. To summarize these results, electrochemical corrosion is dominant in an air environment and microbially influenced corrosion is strongly involved in water corrosion. Additionally, biofilm formation plays a crucial rule in carbon steel corrosion in both air and water, even though microbially-influenced-corrosion-related bacteria are barely involved in this corrosion.

Carbon Dioxide Induced Corrosion of Carbon Steel X65 Exposed to Nitrite Aqueous Solutions

SPE Journal ◽  
2018 ◽  
Vol 24 (05) ◽  
pp. 2279-2291
Author(s):  
Silvia M. Vargas ◽  
Richard Woollam ◽  
William Durnie ◽  
Michael Hodges
Keyword(s):  
Carbon Dioxide ◽  
Carbon Steel ◽  
Corrosion Inhibitors ◽  
Produced Water ◽  
Ph Value ◽  
Oil Fields ◽  
Acid Solutions ◽  
Test Results ◽  
Ph Level ◽  
Carbon Dioxide Co2

Summary Nitrate used to control reservoir souring in oil fields contains nitrite impurities. Nitrite is a strong oxidizer, and when used in souring–treatment fluids, the flow path often includes carbon–steel piping. Vanadium, also an oxidizer, is at times found in oilfield–production streams that commingle with souring–treatment fluids. The interactions between nitrite and vanadium and their effects on carbon steel X65 corrosion were investigated. The effect of nitrite on corrosion was investigated using synthetic brine to simulate produced water [rich in carbon dioxide (CO2), pH value of approximately 5] and seawater (negligible CO2, pH value of approximately 7). Tests were conducted with carbon steel X65 exposed to synthetic brine at 25, 60, and 80°C using a rotating cylinder electrode (RCE). The test results demonstrate the following: The corrosivity of nitrite strongly depends on the pH level. Nitrite increases corrosion at pH of approximately 5 and is relatively benign at pH of approximately 7. Nitrite reduces to ammonium (thermodynamically stable in acid solutions), whereas vanadium(III) delays the formation of ammonium. Inhibited corrosion tests indicate that nitrite reduces the performance of the studied commercial corrosion inhibitors (CIs).

Acoustic Emission Monitoring of Low Carbon Steel Corrosion inside and outside the Comparative Study

2013 ◽  
Vol 331 ◽  
pp. 246-249
Author(s):  
Wei Li ◽  
Shao Fan Wang ◽  
Xin Jia
Keyword(s):  
Acoustic Emission ◽  
Carbon Steel ◽  
Acoustic Emission Signal ◽  
Low Carbon Steel ◽  
Steel Corrosion ◽  
Corrosion Process ◽  
Uniform Corrosion ◽  
Low Carbon ◽  
Emission Signal ◽  
Signal Characteristics

This paper applied acoustic emission technology, monitoring low carbon steel uniform corrosion process, obtained low carbon steel corrosion acoustic emission signal in the process of uniform corrosion, And analyzed acoustic emission signal characteristics of the low carbon steel corrosion process applied the method combining characteristic parameters with wavelet packet transform, in the meantime combined the detection data of storage tank, Contrast acoustic emission signal characteristics of low carbon steel corrosion in experiment conditions and acoustic emission signal characteristics of storage tank corrosion in actual conditions, the result provides reference for acoustic emission research of low carbon steel uniform corrosion process and tanks online acoustic emission testing.

Sign in / Sign up

Export Citation Format

Share Document